Plate material carry-out device

ABSTRACT

The present invention provides a plate material carry-out device that can prevent a possible delay in carrying out a plate material even if the plate material requires only a short processing time, improving cycle time, the plate material carry-out device also requiring only a simple configuration. A plate material carry-out device carries out a processed plate material W from a plate material processing machine  1  to a plate material carry out section  3 . The plate material carry-out device includes a plurality of tracks  11, 12  installed parallel to one another between the plate material processing machine  1  and the plate material carry-out section  3 , and traveling members  13, 14  independently provided on the respective tracks to reciprocate between the plate material processing machine  1  and the plate material carry-out section  3 . Each of the traveling members  13, 14  has plate material holding means  16  holding a plate material W on the plate material processing machine  1 . Further, while one of the traveling members  13, 14  is traveling from the plate material processing machine  1  toward the plate material carry-out section  3 , the other of the traveling members  13, 14  allows the plate material holding means  16  to hold the plate material W on the plate material processing machine  1.

FIELD OF THE INVENTION

The present invention relates to a plate material carry-out device that carries out plate materials processed by a plate material processing machine such as a punch press or a laser processing machine.

BACKGROUND OF THE INVENTION

Plate material processing machines such as punch presses perform various processing operations including an operation of cutting a plurality of product plate materials out of a raw plate material by means of punching and an operation of forming a hole in a single plate material. The product plate materials processed by the plate material processing machine are carried out to a predetermined plate material carry out section by a plate material carry-out device.

Some of these plate material carry-out devices have a traveling member installed on a track disposed between the plate material processing machine and the plate material carry-out section and having a plate material holding means such as suction pads. Plate material carry-out devices have also been proposed which can move along the track in a direction orthogonal to a longitudinal direction and which has a traveling member that can move in two orthogonal axial directions (see, for example, the Unexamined Japanese Patent Application Publication (Tokkai) No. 2003-136166). The plate material carry-out device described in the Unexamined Japanese Patent Application Publication (Tokkai) No. 2003-136166 is designed so that the plate holding means of the traveling member can be expanded and contracted in a traveling direction so as to deal with the various sizes of product plate materials.

Another plate material carry-out device has been proposed which has a plurality or traveling members that travel on an endless circling track to prevent a possible delay in carrying out plate materials requiring only a short processing time, thus improving cycle time (the Unexamined Japanese Patent Application Publication (Tokkai) No. 2000-351032).

With the plate material carry-out device using the single traveling member that reciprocates between the plate material processing machine and the plate material carry-out section, where the plate material processing machine requires a shorter time to process each plate material, the time required for the reciprocation may be longer than the time required to process a product plate material. In this case, each time one plate material is processed, the plate material processing machine must wait until the traveling member of the plate material carry-out device returns. This makes it impossible to take advantage of the processing capacity of the plate material processing machine and increases the cycle time. To improve the cycle time, it is necessary to increase the traveling speed of the traveling member and to reduce the time required for acceleration and deceleration. However, in the plate material carry-out device shown in the Unexamined Japanese Patent Application Publication (Tokkai) No. 2003-1316166, the plate holding means can be expanded and contracted so as to be able to deal with the various sizes of product plate materials. Thus, the traveling member and the plate material holding means are heavy, making it difficult to increase the traveling speed. A reduction in the size and weight of the traveling member allows the traveling speed to be increased. However, a simple reduction in the size and weight of the traveling member prevents large-sized product plate materials from bring carried out.

Carry-out operations can be more efficiency performed by the plate material carry-out device shown in the Unexamined Japanese Patent Application Publication (Tokkai) No. 2000-351032 and using the plurality of traveling members traveling on the circling track. This plate material carry-out device also allows the plurality of traveling members to hold a single product plate material, and can thus deal with large-sized product plate materials. However, since the plurality of traveling members travel on the circling track, it is difficult to configure a means for supplying power to each traveling member and a means for supplying air for suction pads. The power source system requires the use or a trolley or the like, complicating a power source facility, and stably supplying power is difficult. Further, a problem with transmission and reception of control signals to and from each traveling member needs to be solved. For air supply, air cannot be fed from a position-fixed air source to the plurality of traveling members, performing circulating operations. This results in the need to mount a pump on each traveling member. Mounting a pump on each traveling member complicates the configuration and increases facility costs. This also increases the weight of the traveling member, hindering fast traveling.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a plate material carry-out device that can prevent a possible delay in carrying out a plate material even if the plate material requires only a short processing time, thus improving the cycle time, the plate material carry-out device also requiring only a simple configuration. Another object of the present invention is to enable an operation of carrying out a plate material located off a traveling member track on a plate material processing machine and to enable traveling members on a plurality of tracks to cooperatively carry out a plate material. Yet another object of the present invention is to perform effective control for improving the cycle time.

Still another object of the present invention is to enable plate materials of various sizes to be carried out. Further another object of the present invention is to enable an operation of stably carrying out even such a plate material as is largely hidden under a processing means of the plate material carry-put device.

The present invention provides a plate material carry-out device that carries out a processed plate material from a plate material processing machine to a plate material carry out section, the device comprising a plurality of tracks installed parallel to one another between the plate material processing machine and the plate material carry-out section, and traveling members independently provided on the respective tracks to reciprocate between the plate material processing machine and the plate material carry-out section, each of the traveling members having a plate material holding means holding a plate material on the plate material processing machine.

This configuration enables the plurality of traveling members installed on the respective tracks to operate independently to carry out the plate material.

Thus, the present invention prevents a possible delay in carrying out the plate material even if the plate material requires only a short processing time, allowing the cycle time to be improved.

Further, each traveling member is installed on the corresponding track so as to be able to reciprocate along the track. Consequently, the traveling member can be supplied with power and air from a power source and an air source which are installed at fixed positions, through a flexible cable and piping. This simplifies the configuration of the supply system for energy sources.

In the present invention, preferably, the plate material holding means or at least one of the traveling members is provided so as to be movable forward and backward in a horizontal direction orthogonal to a traveling direction, and is able to hold the plate material on the plate material processing machine located off the track for the traveling member in the orthogonal horizontal direction. Where the plurality or tracks are installed parallel to one another, any of the tracks may be forced to lie away from a position where a processed plate material on the plate material processing machine stands by. However, when the plate material holding means can move in the horizontal direction orthogonal to the traveling direction or the traveling member, the traveling members on all the tracks can use the plate material holding means to hold the processed plate material on the plate material processing machine, at the predetermined position where the processed plate material stands by.

This enables the plurality of tracks to be provided such that the traveling member on each of the tracks can carry out a plate material. Further, when the plate material holding means can move in the horizontal direction orthogonal to the traveling direction, it is possible to easily avoid the interference between the plate material holding means of the traveling members during traveling.

In the present invention, the plate material carry-out device may have an independent carry-out control means (22) for performing control such that while one of the traveling members is traveling, the other traveling members allow the plate material holding means to hold the plate material on the plate material processing machine. Where the plate material carry-out device has the independent carry-out control means (22) for performing control such that while one of the traveling members is traveling, the other traveling members allow the plate material holding means to hold the plate material on the plate material processing machine, it is possible to effectively utilize the configuration in accordance with the present invention in which the traveling members are independently installed on the plurality of parallel tracks, to further improve the cycle time.

In the present invention, the plate material carry-out device may have a plural traveling member-cooperation control means (23) for controlling the traveling members and plate material holding members so that the plate material holding members of a plurality of the traveling members hold a single plate material and travel to carry out the plate material. Large-sized plate materials can be carried out by thus allowing the plate material holding means of the plurality of traveling members to hold and convey a single plate material. Thus, plate materials of various sizes can be carried out by switching between a carry-out operation by a single traveling member and cooperative transfer.

The plural-traveling-member cooperation control means (23) may have a pullout and cooperative transfer control section (24) that executes a series of control processes including a process of allowing one of the traveling members to hold the plate material on the plate material processing machine and to pull out the plate material in a track direction, using the plate holding means, a process of allowing another traveling member to hold the pulled-out plate material using the plate material holding means, and a process of allowing both the traveling members to travel to transfer the plate material held by the plate material holding means of both the traveling members. A plate material completely processed by the plate material processing machine and waiting to be carried out may be largely hidden under processing means of the plate material processing machine, for example, a turret of a turret punch press. In this case, the plate material needs to be pulled out, but where only a portion of the plate material which is exposed from the processing means is gripped and the plate material is then pulled out and transferred as it is, the posture of the held plate material may be unbalanced.

The plate material may thus fall. However, stable transfer can be achieved by providing the pullout and cooperative transfer control section (24) to allow one of the traveling members to pull out the plate material on the plate material processing machine and to then allow another traveling member to hold a different portion of the plate material so that both traveling members can hold and transfer the plate material.

The present invention provides the plate material carry-out device that carries out the processed plate material from the plate material processing machine to the plate material carry-out section, the device comprising the plurality of tracks installed parallel to one another between the plate material processing machine and the plate material carry-out section, and the traveling members independently provided on the respective tracks to reciprocate between the plate material processing machine and the plate material carry-out section, each of the traveling members having the plate material holding means holding the plate material on the plate material processing machine. Thus, the present invention prevents a possible delay in carrying out the material even if the material requires only a short processing time, allowing the cycle time to be improved. The present invention can achieve this using the simple configuration.

Where the plate material holding means of at least one of the traveling members is provided so as to be movable forward and backward in the horizontal direction orthogonal to the traveling direction, and is able to hold the plate material on the plate material processing machine located off the track for the traveling member in the orthogonal horizontal direction, the plate material located off the track for the traveling member on the plate material processing machine can be carried out. Further, the traveling members on the plurality of tracks can carry out the plate material.

When the plate material carry-out device has the independent carry out control means for performing control such that while one of the traveling members is traveling, the other traveling members allow the plate material holding means to hold the plate material on the plate material processing machine, effective control can be performed so as to improve the cycle time.

Where the plate material carry-out device has the plural traveling member-cooperation control means for controlling the traveling members and plate material holding members so that the plate material holding members of a plurality of the traveling members hold a single plate material and travel to carry out the plate material, plate materials of various sizes can be carried out.

Where the plural traveling member-cooperation control means has the pullout and cooperative transfer control section that executes the series of control processes including the process of allowing one of the traveling members to hold the plate material on the plate material processing machine and to pull out the plate material in the track direction, using the plate holding means, the process of allowing another traveling member to hold the pulled-out plate material using the plate material holding means, and the process of allowing both the traveling members to travel to transfer the plate material held by the plate material holding means of both the traveling members, it is possible to stably carry out even such a plate material as is largely hidden under the processing means of the late material processing machine.

Other features, elements, processes, steps, characteristics and advantages or the present invention will become more apparent from the following detailed description of preferred embodiments of the present invention with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an entire plate material processing facility comprising a plate material carry-out device in accordance with an embodiment of the present invention.

FIG. 2 is a perspective view showing an operational state in which one of two traveling members in the plate material carry-out device holds a product plate material.

FIG. 3 is a perspective view showing an operational state in which the other traveling member in the plate material carry-out device holds the product plate material.

FIG. 4 is a perspective view showing an operation in which the two traveling members pass each other.

FIG. 5 is a perspective view showing an operational state in which the two traveling members carry out one product plate material together.

FIG. 6 is an enlarged side view of the traveling member of the plate material carry-out device.

FIG. 7 is a diagram illustrating an operation of carrying out a hidden product plate material which operation is performed by the plate material carry-out device.

FIG. 8 is a block diagram of the conceptual configuration of a transfer control device for the plate material carry-out device.

FIG. 9 is a flowchart showing a control operation performed by a pullout and cooperative transfer control section of the transfer control device.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

An embodiment of the present invention will be described with reference to FIG. 1 to FIG. 9. FIG. 1 shows a plate material processing facility comprising a plate material carry-out device in accordance with the present invention. The plate material processing facility comprises a plate material processing machine 1, a plate material carry-out device 2, a plate material carry-out section 3, and a plate material stocker 4. The plate material processing facility further comprises a plate material carry-in device (not shown in the drawings) that carries a raw plate material W0 into the plate material processing machine 1. The description of the plate material carry-in device is omitted.

The plate material processing machine 1 comprises a function of cutting a plurality of product plate materials W out of the raw plate material W0 on a table 5 by means of punching or the like. The plate material processing machine 1 is made of a punch press, a laser processing machine, or the like. In this example, the plate material carry-out device 1 is made of a turret punch press or the like.

The plate material carry-out device 1 comprises an upper turret and a lower turret 6 on which punch tools and die tools, respectively, are mounted, a processing section 7 made of a punch driving mechanism (not shown in the drawings) or the like which drivingly elevates and lowers any of the punch tools on the turret 6 at a processing center P, and a plate material feeding mechanism 8 that moves the raw plate material W0 on the table 5 in a forward-backward direction (Y direction) and a lateral direction (X direction).

The plate material carry-out section 3 is a device on which the product plate materials W processed by the plate material processing machine 1 and carried out by the plate material carry-out device 2 are stacked. The plate material carry-out section 3 is installed on one side of the plate material processing machine 1. The plate material carry-out section 3 comprises a pallet 9 on which plural types of product plate materials W can be stacked in respective stacks, and a pallet moving mechanism 10 that moves the pallet 9 forward and backward on a pallet guiding rail 10 a as shown by arrow A.

The plate material stocker 4 is a device in which the product plate materials W stacked by the plate material carry-out section 3 are stored together with the pallet 9. The plate material stocker 4 has a stocker main body 4 a having a large number of shelves and an elevator 4 b that loads and unloads the product plate materials W onto and from any shelf.

The plate material carry-out device 2 carries out the product plate materials W, the processed plate materials W, out of the plate material processing machine 1 to the plate material carry-out section 3. The plate material carry-out device 2 comprises a plurality of (in the illustrated example, two) tracks 11, 12 installed parallel to each other between the plate material processing machine 1 and the plate material carry-out section 3, and a plurality of (in the illustrated example, two) traveling members 13, 14 installed on the tracks 11, 12, respectively, so as to be independently travelable. The tracks 11, 12 are installed on a common frame 15 at the opposite ends thereof.

Each of the traveling members 13, 14 has a plate material holding means 16 for holding the product plate material W on the plate material processing machine 1. While one of the traveling members 13, 14 is traveling from the plate material processing machine 1 toward the plate material carry-out section 3, the other of the traveling members 13, 14 can perform an operation of holding the product plate material W on the plate material processing machine 1.

FIG. 6 is an enlarged side view of the rear side traveling member 14. The configuration of the front side traveling member 13 is similar to that of the rear side traveling member 13. The traveling members 13, 14 are installed on the tracks 11, 12, respectively, so as to be travelable via guide rollers (not shown in the drawings). Each of the traveling members 13, 14 comprises a traveling driving source (not shown in the drawings) such as a self-traveling electric motor.

The plate material holding means 16 has a movable frame 17 installed on the traveling member 13, 14 so as to be movable forward and backward (in a Y direction) and a plurality of suction pads 18 installed on the movable frame 17. The movable frame 17 is made of an arm-like member extending in a forward-backward direction.

In the embodiment, a plurality of (in the illustrated example, two) movable frames 17 are provided parallel to each other. Each movable frame 17 is driven forward and backward by a forward and backward movement driving source (not shown in the drawings) mounted on each of the traveling members 13, 14. The forward and backward movement driving source may individually independently moves each movable frame 17 forward and backward or move both movable frames 17 forward and backward together. The forward and backward movement driving source is made of an electric motor or the like. Rotation of the forward and backward movement driving source is converted into a linear operation via a rotation-rectilinear propagation converting mechanism such as a rack and pinion mechanism or a ball screw. The forward and backward movement driving source may also be a cylinder device. For the front side traveling member 13, the plate material holding means 16 need not necessarily be movable forward and backward.

In the present embodiment, each of the suction pads 18 is made of a bundle of a plurality of unit suction pads 18 a each connected to a vacuum source via a throttling path. Even if any of the suction pads 18 are not in contact with an object to be sucked such as the product plate material W, the suction pads 18 can suck the object. Instead of being formed into a bundle as described above, each suction pad 18 as a whole may constitute a single negative pressure section.

The plate material holding means 16 is composed that the suction pads 18 can be elevated and lowered with respect to the traveling member 13, 14. In the present embodiment, as means for elevating and lowering the suction pads 18, the individual suction pads 18 are installed on the movable frame 17 via respective elevating and lowering devices 19. Each of the elevating and lowering devices 19 is made of, for example, an air cylinder. Instead of the elevating and lowering device 19 individually elevating and lowering the suction pads 18, the movable frame 17 may be installed so as to be able to elevate and lower relative to the traveling member 13, 14, with an elevating and lowering driving source (not shown in the drawings) provided.

The positional relationship and so on between the two traveling members 13, 14 and the like will be described. The two tracks 11, 12 extending in the forward and backward direction are installed at the same height. The plate material processing machine 1 always processes a final cutaway portion of the product plate material W at a predetermined position (for example, a punch position P). Accordingly, the product plate material W on the plate material processing machine 1 waiting to be carried out is always located at the same position. However, the same position where the product plate material W is always located is one point on the outer periphery of the product plate material W. The center position of the product plate material W varies depending on the size or shape of the product plate material W.

The front side traveling member 13 having its plate material holding means 16 located at a reference position in a forward-backward moving direction can suck the product plate material W standing by at the predetermined position. The rear side traveling member 14 having its plate material holding means 16 moved forward to a forward end can suck the product plate material W standing by at the predetermined position in the plate material processing machine 1. Further, when the rear side traveling member 14 having its plate material holding means 16 moved forward passes the front side traveling member 13 in the traveling direction, the plate material holding means 16 interferes with the front side traveling member 13. However, with the plate material holding means 16 of the rear side traveling member 14 moved backward to the rearward end, the front side and rear side traveling members 13, 14 can pass each other with the plate material holding means 16 prevented from interfering with the traveling member 13. The dimensions of the front side and rear side traveling members 13, 14 and the positional relationship between the traveling members 13, 14 are designed so as to enable the above operations.

A control system will be described with reference to FIG. 8 and FIG. 9.

The plate material carry-out device 2 is controlled by a transfer control device 21. The transfer control device 21 comprises a computer and a transfer program that is executed by the computer. An independent carry-out control means 22 and a plural traveling member-cooperation control means 23 described below are configured on the basis of the program contents or the transfer program.

The independent carry-out control means 22 independently controls the traveling members 13, 14 including their plate material holding means 16. In a normal carry-out operation, the traveling members 13, 14 are controlled by the independent carry-out control means 22. The independent carry-out control means 22 comprises a function of performing control such that while one of the traveling members 13, 14 is traveling, the other of the traveling members 13, 14 allows the plate material holding means 16 thereof to hold the plate material W on the plate material processing machine 1.

The plural traveling member-cooperation control means 23 controls the traveling members 13, 14 and the plate material holding means 16 thereof so that the plate material holding means 16 of the plurality of (two) traveling members 13, 14 can hold the single product plate material W and so that the plurality of traveling members 13, 14 carry out the plate material W.

The plural traveling member-cooperation control means 23 has a pullout and cooperative transfer control section 24. The pullout and cooperative transfer control section 24 performs control shown in the flowchart in FIG. 9 (the control will be described later in detail also with reference to FIG. 7), that is, the control for the following steps. That is, the pullout and cooperative transfer control section 24 performs a series of control operations including the step (step S1 in FIG. 9) in which the plate material holding means 16 of the traveling member 13 holds and pulls out the product plate material W on the plate material processing machine 1 in a track direction (X direction), the step (S2) in which the other traveling member 14 allows the plate member holding means 16 thereof to hold the pulled-out product plate material W, and the step (S3) in which both traveling members 13, 14 travel to convey the product plate material W held by the plate material holding means 16 of both traveling means 13, 14.

The operation of the above configuration will be described. As shown in FIG. 2, when the front side traveling member 13 sucks the product plate material W on the plate material processing machine 1, the rear side traveling member 14 stands by near the front side traveling member 13. As shown in FIG. 3, the front side traveling member 13 gripping the product plate material W travels to the plate material carry-out section 3 to place the product plate material W on the pallet 9 of the plate material carry-out section 3. After placing the product plate material W on the pal let 9, the front side traveling member 13 returns to the plate material processing machine 1. While the front side traveling member 13 is carrying out the product plate material W and returning to the plate material processing machine 1, the rear side traveling member 14 moves the frame 17 of the plate material holding means 16 forward and allows the suction pad 18 to hold and raise the product plate material W as shown in FIG. 3.

As shown in FIG. 4, the rear side traveling member 14 holding the product plate material W moves the frame 17 backward and travels toward the plate material carry-out section 3. This allows the front side traveling member 13 returning from the plate material holding means 3 to the plate material processing machine 1 and the rear side traveling member 14 traveling to the plate material holding means 3 to pass each other without interfering with each other. The plate material carry out section 3 moves the pallet 9 backward so as to be able to receive the product plate material W conveyed by the rear side traveling member 14.

Upon returning to the plate material processing machine 1, the front side traveling member 13 carries out the next product plate material W to the plate material carry-out section 3 and then returns to a standby position near the plate material processing machine 1. Further, the rear side traveling member 14 carries out the product plate material W to the plate material carry-out section 3 and then returns to the standby position near the plate material processing machine 1. Thus, the two traveling members 13, 14 independently carry out the product plate material W. Consequently, even if only a short time is required to process the product plate material W, the plate materials can be carried out without delay, enabling the cycle time to be improved.

FIG. 5 shows an operation in which the two traveling members 13, 14, the front side and rear side traveling members 13, 14, carry out the single product plate material W. A large-sized product plate material W cannot be transferred by the single traveling member 13 or 14. However, as shown in FIG. 5, the large-sized product plate material W can be carried out by allowing both traveling members 13, 14 to travel in synchronism with the plate material holding means 16 of the two traveling members 13, 14 holding the front and rear parts, respectively, of the same product plate material W. Further, in this case, compared to the case where the size of the traveling members 13, 14 is increased to enable the large-sized product plate material W to be transferred, each of the traveling members 13, 14 has only to have a small size, allowing a reduction in the weight of the traveling members and an increase in the speed of the traveling members 13, 14. This also enables a reduction in the time required for acceleration and deceleration. The plural traveling member-cooperation control means 23, shown in FIG. 8, controls the operation in which the two traveling members 13, 14 carry out the same product plate material W together.

FIG. 7 shows an operation performed when the product plate material W is hidden. Where the product plate material W is small enough to be largely hidden under the turret 6 or the like of the processing section 7 as shown in FIG. 7A, the product plate material W cannot be held by the plate material holding means 16 in a well-balanced manner. In this case, as shown in FIG. 7A, the plate material holding means 16 of the traveling member 13 grips a part of the product plate material W which is exposed from the processing section 7. Then, as shown in FIG. 7B, the plate material holding means 16 pulls out the product plate material W on the table 5 so as to expose the whole product plate material W (step S1 in FIG. 9).

Subsequently, the pulled-out and exposed part of the product plate material W is held by the plate material holding means 16 of the other traveling member 14 (step 2 in FIG. 9). With the whole product plate material W thus held by the two traveling members 13, 14 in a well-balanced manner, both traveling members 13, 14 are allowed to travel together to transfer the product plate material W. In this manner, even if the product plate material W is largely hidden under the processing section 7, the whole product plate material W can be held in a well-balanced manner and stably transferred.

In the above embodiment, the plate material holding means 16 of both traveling members 13, 14 can move forward and backward. However, the traveling member (in this case, the front side traveling member 13) corresponding to the reference position for product carry-out in the plate material processing machine 1 need not necessarily be movable forward and backward. However, when both traveling members 13, 14 are movable forward and backward, the following is possible. Where the product plate material W internally has a hole forming portion or a shape forming portion positioned so as to correspond to any of the suction pads 18, shifting the forward-backward position of the plate material holding means 16 allows the suction pad 18 to lie away from the hole or shape forming portion of the product plate material W, enabling stable suction.

While the present invention has been described with respect to preferred embodiments thereof, it will be apparent to those skilled in the art that the disclosed invention may be modified in numerous ways and may assume many embodiments other than those specifically set out and described above. Accordingly, it is intented by the appended claims to cover all modifications of the present invention that fall within the true spirit and scope of the invention. 

1. A plate material carry-out device that carries out a processed plate material from a plate material processing machine to a plate material carry-out section, the device being characterized by comprising a plurality of tracks installed parallel to one another between the plate material processing machine and the plate material carry-out section, and traveling members independently provided on the respective tracks to reciprocate between the plate material processing machine and the plate material carry-out section, each of the traveling members having plate material holding means holding a plate material on the plate material processing machine.
 2. A plate material carry-out device according to claim 1, characterized in that said plate material holding means of at least one of said traveling members is provided so as to be movable forward and backward in a horizontal direction orthogonal to a traveling direction, and is able to hold the plate material on the plate material processing machine located off the track for said traveling member in said orthogonal horizontal direction.
 3. A plate material carry-out device according to claim 1, characterized by having independent carry-out control means for performing control such that while one of the traveling members is traveling, the other traveling members allow the plate material holding means to hold the plate material on the plate material processing machine.
 4. A plate material carry-out device according to claim 1, characterized by having plural traveling member-cooperation control means for controlling said traveling members and plate material holding members so that the plate material holding members of a plurality or the traveling members hold a single plate material and travel to carry out the plate material.
 5. A plate material carry-out device according to claim 4, characterized in that said plural traveling member-cooperation control means has a pullout and cooperative transfer control section that executes a series of control processes including a process of allowing one of the traveling members to hold the plate material on the plate material processing machine and to pull out the plate material in a track direction, using the plate holding means, a process of allowing another traveling member to hold the pulled-out plate material using the plate material holding means, and a process of allowing both the traveling members to travel to transfer the plate material held by the plate material holding means of both the traveling members. 